I feel like unless we figure out an extremely clever trick, we need just gigantic particle accelerators or quantum computers orders of magnitude better than we can currently conceive of to make substantial steps forward in physics anymore. Like, we're not even talking "Well, the USSR/China could do it because they weren't/aren't as beholden to the profit motive", we're talking particle accelerators the size of fucking countries, and helium liquid cooling on large scales to maintain quantum coherence unless we figure out more room-temperature shit.

String theory is a neat idea and I do genuinely find it interesting and have read books on it, but at the end of the day it's just a giant "so what" to me. Not "what's the point of making physics advancements" obviously, but "what's the point of creating these massive, complicated theories if we need a particle accelerator the size of the solar system to prove them right or wrong".